Spindle of cap-spinning machines



Dec. 22, 1936.

E. KINSELLA ET AL SPINDLE 0F CAP SPINNING MACHINES Filed Aug. 20, 1935 EDWARD KINSELLA CHARLES W- ADDY Patented Dec. 22 1936 UNITED STATES PATET QFFIQE SPINDLE OF CAP-SPINNING MACHINES of Delaware Application August 20, 1935, Serial No. 36,953 In Great Britain September 17, 1934 3 Claims.

This invention relates to cap-spinning machines. In cap-spinning machines each cap is carried from the top of a stationary spindle extending upwardly through a bobbin upon which the yarn being spun is wound, the bobbin itself being mounted upon a tube surrounding the stationary spindle and driven by means of a wharl on its lower end and a driving belt engaging the wharl. The cap depends round the bobbin, and the lower edge thereof guides the thread, which rotates round the cap in the form of a balloon, on to the bobbin. The stationary spindle is mounted at its lower end in a spindle rail extending along the length of the machine, the spindle being screw-threaded at the bottom, passing through a hole in the spindle rail and being secured in position by means of two lock nuts, one above and one below the spindle rail. The height of the cap may be adjusted (e. g. according to the idiosyncrasies of the particular bobbin employed) by adjusting the position of the lock nuts on the threaded part of the stationary spindle. In order to efiect such adjustment it is necessary to loosen one of the lock nuts, to hold the spindle from rotating by means of a spanner fitting on a square at the lower end of the spindle, to move the nuts up or down as required and finally to lock them. When the nuts have been loosened, however, the spindle is loose in the spindle rail and is apt to be unsteady so that visual setting of the cap is rendered difiicult, and, moreover, the cap is liable to catch and damage the bobbin or the yarn thereon. It is an object of the present invention to provide a form of mounting for the cap-spindle in the spindle rail which shall be free from these disadvantages.

According to the present invention the capspindle mounting comprises a collet into which the threaded end of the cap spindle is screwed, the collet being externally coned and provided with radial slits, and a locking member adapted to force the coned part of the collet into a coned bore in the spindle rail so as to contract the collet on the threaded part of the cap-spindle. When it is 45 desired to adjust the height of the cap, the collet is slackened slightly in the bore of the rail so that, without rendering the collet loose in the rail or the spindle loose in the collet, the spindle may be screwed up or down as required, after which the 50 coned part of the collet is again forced into the bore of the spindle rail.

By the use of the mounting according to the present invention, only a single nut requires to be loosened in order to adjust the height of the cap.

55 Moreover, the parts involved may be accurately formed so as to hold the cap spindle accurately and securely in position, and by reason of the nature of the device such accuracy is not impaired unduly by wear. Not only is the amount-of wear taking place considerably reduced by making the adjustment of the spindle easier to effect with less movement of the parts concerned, but also any wear which may occur is of less importance since the fitting of the cone into the bore of the rail and the gripping of the screw-threaded part of the cap-spindle by the collet are substantially independent of such wear.

The conical formation of the collet and of the bore in the spindle rail may extend through the whole of the rail or a part only thereof. In any case, however, the radial slits or sawcuts in the collet which give flexibility thereto and enable it to grip the screw-threaded part of the cap-spindle extend beyond the zone in which the coned part of the collet engages with the coned part of the rail. Although the sawcuts might extend over the whole depth of the collet, so as to divide the collet into several separate pieces, it is preferable, to avoid difficulties of assembly, that the sawcuts should not extend so far.

By way of example, two forms of cap-spindle mounting according to the present invention will now be described with greater detail with reference to the accompanying drawing.

In the drawing:

Fig. 1 shows a cap-spinning device in side elevation;

Figs. 2 and 3 show in sectional elevation and. plan respectively one form of mounting; and

Figs. 4 and 5 show in views similar to Figs. 2 and 3 a second form of mounting.

Referring to Fig. l, a cap 9 is carried by the upper end of a spindle Ill mounted on a stationary spindle rail H. A bobbin l2 surrounds the spindle it above a lifter rail l3, which has an up-anddown motion imparted (by means not shown) to cause yarn to be traversed over the length of the bobbin barrel by the lower edge 14 of the cap 9. At the upper limit of traverse of the bobbin I2, the edge Id of the cap should lay the yarn on the bobbin barrel level with the upper surface of the lower flange l5 of the bobbin. To enable this to be done with all bobbins, the spindle ll! is adjustable in height in the rail II. The bobbin is rotated by means of the belt 16.

Figs. 2 and 3 show the spindle rail ll provided with a parallel bore ll through the greater part of its depth, such bore being coned at a semi-vertical angle of 10 near its upper end 18. A substantially cylindrical collet I9 is employed which lower side 32 of the rail ll.

expands, however, near its upper end into a cone 20 fitting the conical bore I8 of the rail H. The collet is screw-threaded internally to fit screw threads 2! on the lower end of the spindle Ill and is screw-threaded externally near its lower end. A large wing nut 22 is provided to fit external screw threads 23 at the lower end of the collet l 9.

Three radial sawcuts 24 are provided in the collet, spaced apart at 120, the sawcuts extending through the coned part of the collet and below into the cylindrical part. In the assembled device the cap-spindle it] is screwed into the collet l9 and the collet fits in the bore ll of the rail. The wing nut 22 is tightened up beneath the rail ii and draws the collet l9 firmly downwards so that the coned part 20 of the collet is pulled into engagement with the coned part l8 of the bore in the rail. In this manner the collet is drawn into rigid engagement with the bore in the spindle rail, and by reason of the sawcuts 24 in its upper end closes in upon and firmly grips the threaded part 2 [at the lower end of the spindle I0.

The'lower edge 25 of the bore I! is counter-sunk and the'nut 22 on the collet is coned on its upper side tofit, so that, on tightening of the nut, the spindle lil is centralized in the bore both by the conedp'art 2B of the collet at the top of the bore and by the oppositely coned nut 22 at the bottom of the bore.

When the collet i9 is released, the spindle it! can be readilyscrewed up and down in the collet by means of a spanner engaging the squared lower end 26' of the spindle.

In the form of mounting shown in Figs. 4 and 5;the bore '27 of thespindle rail is conical nearly throughout, and the collet 28 is coned over substantially its whole length. In order to reduce the 'area of engagement between the bore of the rail andof the collet, a broad annular groove 29 is provided round the conical surface of the collet midway along its length. The coned part of the collet terminates in a cylindrical part 30 provided with a screw thread on which is fitted a large nut 3|, the nut engaging directly against the fiat Three sawcuts 33 are "provided in the collet which extend through and below the coned part thereof.

"The action of the collet in gripping the spindle and being firmly drawn intoen gagement with the bore in the rail is similar to that described with reference to the first form of mounting, except that centering of the spindle is effected solely by means of the large coned surface of the collet, extending through nearly the whole depth of the rail.

In the form of mounting shown in Figs. 4 and 5, a wing nut similar to that shown in Figs. 2 and 3 may be employed for hand adjustment; likewise, a plain nut may be used in the mounting in Figs. 2 and 3.

What we claim and desire to secure by Letters Patent is:

1. In a cap-spinning machine having a spindle rail, a spindle mounted on said rail and a cap carried by said spindle, the combination of a split collet coned externally to fit a boring tapered over at least part of its length in the spindle rail and having a screw-threaded bore, the spindle having a threaded lower end to fit said bore and being adapted to extend completely through said collet, means on the lower end of said spindle to facilitate the turning thereof, and means to draw the collet into the bore so as to contract the collet on the spindle.

2. In a cap-spinning machine having a spindle coned on its upper side to fit the boring on the. lower side of said spindle rail, said nut fitting said.

screw-threaded part to draw the collet into the bore so as to contract the collet on the spindle and to centralize said collet in said bore.

3. In a cap-spinning machine having a spindle rail, a spindle mounted on said rail and a cap.

carried by said spindle, the combination of a split collet coned. externally to fit a boring tapered. over substantially the whole of its length in the.

spindle rail, said collet being provided with a broad groove midway along its length and having a screw-threaded bore to receive the threaded lower end of the spindle, a screw-threaded part of the collet extended beyond the bore in the,,rai1; and a nut fitting said screw-threaded part to draw the collet into the bore so as to contract the collet on the spindle.

EDWARD KINSELLA. CHARLES WESLEY ADDY. 

